WO2012015150A1 - Device for generating photovoltaic power and method for manufacturing same - Google Patents

Device for generating photovoltaic power and method for manufacturing same Download PDF

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Publication number
WO2012015150A1
WO2012015150A1 PCT/KR2011/003124 KR2011003124W WO2012015150A1 WO 2012015150 A1 WO2012015150 A1 WO 2012015150A1 KR 2011003124 W KR2011003124 W KR 2011003124W WO 2012015150 A1 WO2012015150 A1 WO 2012015150A1
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WO
WIPO (PCT)
Prior art keywords
cell
connection member
insulating film
via hole
cells
Prior art date
Application number
PCT/KR2011/003124
Other languages
French (fr)
Korean (ko)
Inventor
조호건
Original Assignee
엘지이노텍주식회사
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Filing date
Publication date
Application filed by 엘지이노텍주식회사 filed Critical 엘지이노텍주식회사
Priority to CN201180037336XA priority Critical patent/CN103201854A/en
Priority to US13/813,248 priority patent/US9391215B2/en
Priority to EP11812681.2A priority patent/EP2511961A4/en
Priority to JP2013521675A priority patent/JP2013532907A/en
Publication of WO2012015150A1 publication Critical patent/WO2012015150A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/02016—Circuit arrangements of general character for the devices
    • H01L31/02019—Circuit arrangements of general character for the devices for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/02021—Circuit arrangements of general character for the devices for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0224—Electrodes
    • H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/0445—PV modules or arrays of single PV cells including thin film solar cells, e.g. single thin film a-Si, CIS or CdTe solar cells
    • H01L31/046—PV modules composed of a plurality of thin film solar cells deposited on the same substrate
    • H01L31/0465—PV modules composed of a plurality of thin film solar cells deposited on the same substrate comprising particular structures for the electrical interconnection of adjacent PV cells in the module
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • Embodiment relates to a photovoltaic device and a method of manufacturing the same.
  • the CIGS photovoltaic device which is a pn heterojunction device having a substrate structure including a glass substrate, a metal back electrode layer, a p-type CIGS-based light absorbing portion, a high resistance buffer, an n-type window layer, and the like, is widely used.
  • Embodiments provide a photovoltaic device and a method of manufacturing the same, which can be easily manufactured with high reliability by preventing disconnection.
  • Photovoltaic device includes a substrate; A first cell disposed on the substrate; A second cell adjacent to the first cell; A first insulating film covering the first cell and the second cell; And a connection member connecting the first cell and the second cell, wherein the first insulating film comprises: a first via hole exposing the first cell; And a second via hole exposing the second cell, wherein the connection member connects the first cell and the second cell through the first via hole and the second via hole.
  • Photovoltaic device includes a substrate; A first cell disposed on the substrate; A second cell adjacent to the first cell; A connection member connected to the first cell and the second cell; And a plating layer coated on an outer surface of the connection member.
  • a method of manufacturing a solar cell apparatus includes forming first and second cells adjacent to each other on a substrate; Forming a first insulating film having a first via hole and a second via hole exposing the first cell and the second cell, respectively; And forming a connection member connected to the first cell and the second cell through the first via hole and the second via hole.
  • the solar cell apparatus connects adjacent cells by a connecting member connected through a via hole formed in an insulating film. After the insulating film is disposed on the cells, and via holes are formed in the insulating film to expose the cells, the connection member may be printed corresponding to the via holes.
  • connection member is formed by the printing method, the solar cell apparatus according to the embodiment can be easily manufactured.
  • connection member in the state where the connection member is printed, the connection member and the cells can be plated by electroplating. Accordingly, the connection member is firmly connected to the cells, and the solar cell apparatus according to the embodiment prevents disconnection and the like.
  • connection characteristics between the connection member and the cells are improved, and the solar cell apparatus according to the embodiment has improved electrical characteristics.
  • the solar cell apparatus according to the embodiment can be easily formed and has improved reliability.
  • FIG. 1 is a plan view illustrating a solar cell panel according to an embodiment.
  • FIG. 2 is an enlarged plan view illustrating a state in which a first cell and a second cell are connected.
  • FIG. 3 is a cross-sectional view taken along the line A-A 'of FIG. 1.
  • FIGS. 4 to 9 are views illustrating a process of manufacturing the solar cell apparatus according to the embodiment.
  • each substrate, layer, film, or electrode is described as being formed “on” or “under” of each substrate, layer, film, or electrode, etc.
  • "On” and “under” include both “directly” or “indirectly” formed through other components.
  • the criteria for the top or bottom of each component will be described with reference to the drawings. The size of each component in the drawings may be exaggerated for description, and does not mean a size that is actually applied.
  • FIG. 1 is a plan view illustrating a solar cell panel according to an embodiment.
  • FIG. 2 is an enlarged view of a state in which a first cell C1 and a second cell C2 are connected.
  • FIG. 3 is a cross-sectional view taken along the line A-A 'of FIG. 1.
  • a solar cell panel includes a support substrate 100, a plurality of cells C1, C2..., A first insulating film 310, and a second insulating film 320.
  • the plurality of connection members 400 include a plating layer 500, a first bus bar 610, and a second bus bar 620.
  • the support substrate 100 supports the cells C1, C2..., The first insulating film 310, the second insulating film 320, and the connection members 400.
  • the support substrate 100 has a plate shape and is flexible.
  • the support substrate 100 is an insulator.
  • the support substrate 100 may be, for example, a stainless steel substrate or a polymer substrate including ethylene vinyl acetate (EVA), polyimide (PI), or the like.
  • EVA ethylene vinyl acetate
  • PI polyimide
  • the cells C1, C2... are disposed on the support substrate 100.
  • the cells C1, C2... May be spaced apart from each other and arranged in a matrix form.
  • the cells C1, C2... May have a shape extending in one direction and may be arranged in a stripe shape.
  • the cells C1, C2 ... are connected in series or in parallel with each other.
  • the cells C1, C2..., Spaced apart from each other are connected in series or in parallel with each other by the connection members 400, the first bus bar 610, and the second bus bar 620. do.
  • the cells C1, C2 ... receive sunlight and convert it into electrical energy.
  • the cells C1, C2 ... may be a silicon compound solar cell, a semiconductor compound solar cell such as a CIGS solar cell, and a dye-sensitized solar cell.
  • Each cell C1, C2... May include a back electrode 210, a light absorbing unit 220, a buffer 230, a high resistance buffer 240, and a window 250.
  • the back electrode 210 is disposed on the support substrate 100.
  • the back electrode 210 is a conductive layer, and examples of the material used as the back electrode 210 may include molybdenum and the like.
  • the back electrode 210 has a relatively large area. That is, the back electrode 210 has a larger area than the light absorbing part 220, the buffer 230, the high resistance buffer 240, and the window 250.
  • part of the top surface of the back electrode 210 is exposed. That is, part of the back electrode 210 protrudes laterally with respect to the side surface of the light absorbing unit 220.
  • the light absorbing part 220 is disposed on the back electrode layer.
  • the light absorbing part 220 absorbs sunlight incident through the window 250.
  • the light absorbing unit 220 may include the group I-III-VI compound.
  • the light absorbing unit 220 may be formed of a copper-indium-gallium-selenide-based (Cu (In, Ga) Se 2 ; CIGS-based) crystal structure, copper-indium-selenide, or copper-gallium-selenium. It may have a amide crystal structure.
  • the energy band gap of the light absorbing unit 220 may be about 1 eV to 1.8 eV.
  • the buffer 230 is disposed on the light absorbing part 220.
  • the buffer 230 includes cadmium sulfide (CdS), and the energy bandgap of the buffer 230 is about 2.2 eV to 2.4 eV.
  • the high resistance buffer 240 is disposed on the buffer 230.
  • the high resistance buffer 240 includes zinc oxide (i-ZnO) that is not doped with impurities.
  • the energy bandgap of the high resistance buffer 240 is about 3.1 eV to 3.3 eV.
  • the window 250 is disposed on the high resistance buffer 240.
  • the window 250 is transparent and is a conductive layer.
  • the resistance of the window 250 is higher than that of the back electrode 210.
  • the resistance of the window 250 may be about 10 to 200 times greater than the resistance of the back electrode 210.
  • the window 250 may include aluminum doped zinc oxide (AZO), gallium doped zinc oxide (GZO), or the like.
  • the window 250 may have a thickness of about 800 nm to about 1200 nm.
  • the light absorbing unit 220, the buffer 230, the high resistance buffer 240, and the window 250 may have substantially the same area.
  • an area of the light absorbing part 220, the buffer 230, the high resistance buffer 240, and the window 250 may be smaller than that of the back electrode 210.
  • the light absorbing part 220 may be stacked while forming a step shape on the back electrode 210. That is, the light absorbing unit 220 may form a step with the back electrode 210.
  • the buffer 230, the high resistance buffer 240, and the window layer 252 do not form a step with the back electrode 210. That is, the outside of the light absorbing unit 220, the buffer 230, the high resistance buffer 240, and the window layer 252 may substantially coincide with each other.
  • the back electrode 210 has an exposed area OA exposed from the light absorbing part 220. That is, the exposed area OA is an area where the light absorbing part 220 is not disposed on the top surface of the back electrode 210.
  • the first insulating film 310 is disposed on the support substrate 100.
  • the first insulating film 310 covers the cells C1, C2...
  • the first insulating film 310 is disposed on the cells C1, C2...
  • the first insulating film 310 may cover the entirety of the cells C1, C2...
  • the first insulating film 310 may be in close contact with the cells C1, C2... And the support substrate 100.
  • the first insulating film 310 is transparent and insulator. Ethylene vinyl acetate may be used as an example of the material used for the first insulating film 310.
  • the first insulating film 310 includes a plurality of first via holes 311 and a plurality of second via holes 312.
  • the first via holes 311 pass through the first insulating film 310 and expose portions of the cells C1, C2... In more detail, the first via holes 311 expose the top surface of the window 250 of the cells C1, C2...
  • the first via holes 311 may be formed to correspond to the periphery of the window 250 of the cells C1, C2...
  • the second via holes 312 pass through the first insulating film 310 and expose other portions of the cells C1, C2... In more detail, the second via holes 312 expose the top surface of the back electrode 210 of the cells C1, C2. In more detail, the second via holes 312 are formed corresponding to the exposed area OA.
  • the second insulating film 320 is disposed on the first insulating film 310.
  • the second insulating film 320 may cover the connection members 400, the first bus bar 610, and the second bus bar 620.
  • the second insulating film 320 may cover the entire upper surface of the first insulating film 310.
  • the second insulating film 320 may be in close contact with the first insulating film 310.
  • the second insulating film 320 seals the cells C1, C2...,
  • the connection members 400, the first bus bar 610, and the second bus bar 620 with respect to the outside. can do.
  • the second insulating film 320 is transparent and is an insulator.
  • the second insulating film 320 may be flexible and have high durability.
  • the second insulating film 320 may be formed of the same material as the first insulating film 310. Examples of the material used as the second insulating film 320 may include ethylene vinyl acetate, polyimide or polyethylene terephthalate.
  • connection members 400 are disposed between the cells C1, C2... In addition, the connection members 400 are disposed on the first insulating substrate, inside the first via holes 311, and inside the second via holes 312.
  • connection members 400 connect the cells C1, C2...
  • the connection members 400 connect adjacent cells C1, C2...
  • the connection members 400 connect the cells C1, C2... Which are adjacent to each other through the first via holes 311 and the second via holes 312. That is, the connection members 400 are connected to the cells C1, C2... Through the first via holes 311 and the second via holes 312.
  • connection members 400 connect the cells C1, C2... In series. That is, the connection members 400 connect the window 250 of one cell to the back electrode 210 of the adjacent cell.
  • the connection members 400 cover the first via holes 311 and the second via holes 312. That is, one connection member 400 simultaneously covers one first via hole 311 and one second via hole 312.
  • connection members 400 are conductors.
  • the connection members 400 may be, for example, conductive paste or conductive tape.
  • the connection members 400 may be, for example, silver (Ag) paste or copper plate.
  • connection members 400 are flexible. That is, the connection members 400 may be curved as the support substrate 100 is bent.
  • connection members 400 are connected to the cells C1, C2... Through the first via holes 311 and the second via holes 312, respectively. That is, some of the connection members 400 are disposed inside the first via holes 311 and the second via holes 312, and are connected to the cells C1, C2...
  • one of the connection members 400 may connect the first cell C1 and the second cell C2 in series with each other.
  • the first cell C1 and the second cell C2 are disposed adjacent to each other.
  • One of the first via holes 311 exposes a portion of the window 251 of the first cell C1
  • one of the second via holes 312 is a back electrode of the second cell C2. A part of the upper surface of 211 is exposed.
  • connection member 400 is connected to the window 250 of the first cell C1 through the first via hole 311.
  • the connection member 400 may be connected to the window 250 of the first cell C1 by direct contact.
  • connection member 400 is connected to the exposed area OA of the back electrode 210 of the second cell C2 through the second via hole 312.
  • connection member 400 may be connected by direct contact with the back electrode 210 of the second cell C2.
  • the plating layer 500 surrounds the connection members 400.
  • the plating layer 500 is disposed on the window 250 of the cells C1, C2... Exposed by the first via holes 311.
  • the plating layer 500 is disposed on the top surface of the back electrode 210 of the cells C1, C2..., Exposed to the second via holes 312.
  • the plating layer 500 may be interposed between the connection members 400 and the windows 250 of the cells C1, C2.
  • the plating layer 500 may be interposed between the connection members 400 and the rear electrodes 210 of the cells C1, C2.
  • connection members 400 may be connected to the window 250 of the cells C1, C2... And the back electrode 210 of the cells C1, C2... Through the plating layer 500.
  • the plating layer 500 is interposed between the connection members 400 and the window 250 of the cells C1, C2..., The connection members 400 and the cells C1, C2.
  • the plating layer 500 is interposed between the connection members 400 and the rear electrodes 210 of the cells C1, C2..., The connection members 400 and the cells C1, Improve the electrical and mechanical properties between windows 250 of C2 ).
  • the plating layer 500 is plated on the connection members 400, the window 250 of the cells C1, C2..., And the back electrode 210 of the cells C1, C2. Can be formed.
  • the plating layer 500 is a conductive layer, and may include a metal of low resistance. Examples of the material used for the plating layer 500 may include copper, silver, or gold.
  • the first bus bar 610 connects the cells C1, C2... In parallel.
  • the first bus bar 610 may be connected to the rear electrode 210 of the cells C1, C2...
  • the first bus bar 610 may be disposed between the first insulating film 310 and the rear electrodes 210 of the cells C1, C2...
  • the first bus bar 610 may have an extended shape and may be connected to an adjacent solar cell panel or an external power storage device.
  • the second bus bar 620 connects the cells C1, C2... In parallel.
  • the first bus bar 610 may be connected to the window 250 of the cells C1, C2...
  • the second bus bar 620 may be disposed between the first insulating film 310 and the window 250 of the cells C1, C2...
  • the second bus bar 620 may have an extended shape and may be connected to an adjacent solar cell panel or an external power storage device.
  • the first bus bar 610 and the second bus bar 620 are conductors, and examples of the material used as the first bus bar 610 and the second bus bar 620 include copper or silver. have.
  • the bus bar and the second bus bar 620 may be manufactured in the form of a paste or a conductive tape.
  • connection members 400 connect adjacent cells C1, C2... Through the first via holes 311 and the second via holes 312.
  • the connection members 400 are connected to an upper surface of the window 250 of the cells C1, C2..., And an upper surface of the rear electrode 210.
  • the connection members 400 may be formed by printing paste.
  • connection members 400 are formed by a printing method, the solar cell apparatus according to the embodiment may be easily manufactured by an automated process.
  • the plating layer 500 may be formed by electroplating on the connection members 400 and the cells C1, C2. Accordingly, the connection members 400 are firmly connected to the cells C1, C2..., And the solar cell panel according to the embodiment prevents disconnection.
  • the solar cell panel according to the embodiment has improved electrical and mechanical Has
  • the solar cell panel according to the embodiment can be easily formed and has improved reliability.
  • FIGS. 4 to 9 are views illustrating a process of manufacturing the solar cell panel according to the embodiment.
  • the description of the solar cell panel described above may be essentially combined.
  • a plurality of back electrodes 210 are formed on the support substrate 100.
  • a back electrode layer is formed on the support substrate 100.
  • the back electrode layer may be formed by depositing molybdenum on the support substrate 100 by a vacuum deposition process such as sputtering.
  • the back electrode layer is patterned by a laser or the like, and the back electrode layer is divided into the back electrodes 210.
  • a light absorbing layer 221, a buffer layer 231, a high resistance buffer layer 241, and a window layer 252 are formed on the back electrodes.
  • the light absorbing layer 221 may be formed by a sputtering process or an evaporation method.
  • the light absorbing layer 2221 For example, copper, indium, gallium, selenide-based (Cu (In, Ga) Se 2 ; CIGS-based) while evaporating copper, indium, gallium, and selenium simultaneously or separately to form the light absorbing layer 221.
  • the method of forming the light absorbing layer 221 and the method of forming the metal precursor film by the selenization process are widely used.
  • a metal precursor film is formed on the back electrodes 210 by a sputtering process using a copper target, an indium target, and a gallium target.
  • the metal precursor film is formed of a copper-indium-gallium-selenide-based (Cu (In, Ga) Se 2 ; CIGS-based) light absorbing layer 221 by a selenization process.
  • the sputtering process and the selenization process using the copper target, the indium target, and the gallium target may be simultaneously performed.
  • a CIS-based or CIG-based light absorbing layer may be formed by using only a copper target and an indium target, or by a sputtering process and a selenization process using a copper target and a gallium target.
  • cadmium sulfide is deposited by a sputtering process or a chemical bath depositon (CBD) or the like, and the buffer layer 231 is formed.
  • zinc oxide is deposited on the buffer layer 231 by a sputtering process, and the high resistance buffer layer 241 is formed.
  • the buffer layer 231 and the high resistance buffer layer 241 are deposited to a low thickness.
  • the thickness of the buffer layer 231 and the high resistance buffer layer 241 is about 1 nm to about 80 nm.
  • the window layer 252 may be formed by depositing aluminum-doped zinc oxide on the high resistance buffer 240 layer by a sputtering process.
  • the light absorbing layer 221, the buffer layer 231, the high resistance buffer 240 layer, and the window layer 252 are patterned by laser or mechanical scribing.
  • the light absorbing layer 221, the buffer layer 231, the high resistance buffer 240 layer, and the window layer 252 may be patterned at a time. Accordingly, a plurality of light absorbing parts 220, a plurality of buffers 230, a plurality of high resistance buffers 240, and a plurality of windows 250 are formed.
  • the back electrode 210, the light absorbing unit 220, the buffer 230, the high resistance buffer 240 and the window 250 on the support substrate 100 Cells C1, C2 ... are formed.
  • the light absorbing layer 221, the buffer layer 231, the high resistance buffer layer 241, and the window layer 252 are patterned to expose portions of the top surfaces of the back electrodes 210. Accordingly, an exposed area OA is formed on the top surfaces of the back electrodes 210.
  • the back electrodes 210 and the light absorbing parts 220 have a structure stacked in a step shape.
  • a first insulating film 310 is formed on the cells C1, C2. That is, the first insulating film 310 is bonded to the support substrate 100 on which the cells C1, C2... Thereafter, a plurality of first via holes 311 and a plurality of second via holes 312 are formed in the first insulating film 310.
  • the first via holes 311 expose the top surfaces of the windows 250, and the second via holes 312 expose the exposed areas OA of the back electrodes 210.
  • connection members 400 are formed on the first insulating film 310.
  • the connection members 400 are formed by a printing method such as silk screen printing.
  • a conductive paste including conductive particles such as metal particles may be printed between the cells C1, C2...
  • the conductive paste may be printed to cover the first via holes 311 and the second via holes 312. Accordingly, the connection members 400 are formed.
  • connection members 400 may be rougher separately in a drying process and a heat treatment process.
  • a plating layer 500 is formed, and a second insulating film 320 is formed on the first insulating film 310.
  • the plating layer 500 may be formed by electroplating.
  • a cathode is connected to the connection member 400 so that metal ions such as copper ions included in an electrolyte are transferred to the connection member 400, the exposed windows 250, and the exposed rear electrodes 210. Plated on.
  • connection member 400 may not be completely in contact with the back electrodes 210 and the windows 250. That is, a part of the connection member 400 is in direct contact with the back electrodes 210 and the windows 250, but the other part of the connection member 400 is the back electrodes 210 and the window. It may be spaced apart forming a space with the (250).
  • the plating layer 500 is formed by electroplating on the connection members 400, the top surfaces of the back electrodes 210, and the top surfaces of the windows 250.
  • the plating layer 500 is formed in some space between the connection members 400 and the back electrodes 210 and in some space between the connection members 400 and the windows 250. Can be.
  • the metal ions included in the electrolyte may be plated in the space between the connection member 400 and the windows 250 and in the space between the connection member 400 and the back electrodes 210.
  • the plating layer 500 improves electrical and mechanical properties between the connection members 400 and the windows 250 and between the connection members 400 and the back electrodes 210. .
  • the solar cell panel according to the embodiment may collectively form the connection members 400 by a printing method.
  • the solar cell panel according to the embodiment has improved characteristics.
  • Photovoltaic device and its manufacturing method according to the embodiment can be used in the field of photovoltaic power generation.

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  • Life Sciences & Earth Sciences (AREA)
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  • Photovoltaic Devices (AREA)

Abstract

Disclosed are a device for generating photovoltaic power and a method for manufacturing same. The device for generating photovoltaic power comprises: a substrate; a first cell which is arranged on the substrate; a second cell which is adjacent to the first cell; a first insulation film which covers the first cell and the second cell; and a connection member which connects the first cell and the second cell, wherein the first insulation film comprises a first via hole for exposing the first cell and a second via hole for exposing the second cell, and wherein the connection member connects the first cell and the second cell by penetrating through the first via hole and the second via hole.

Description

태양광 발전장치 및 이의 제조방법Photovoltaic device and its manufacturing method
실시예는 태양광 발전장치 및 이의 제조방법에 관한 것이다.Embodiment relates to a photovoltaic device and a method of manufacturing the same.
최근 에너지의 수요가 증가함에 따라서, 태양광 에너지를 전기에너지로 변환시키는 태양광 발전장치에 대한 개발이 진행되고 있다. Recently, as the demand for energy increases, the development of a photovoltaic device for converting solar energy into electrical energy is in progress.
특히, 유리기판, 금속 후면전극층, p형 CIGS계 광 흡수부, 고 저항 버퍼, n형 윈도우층 등을 포함하는 기판 구조의 pn 헤테로 접합 장치인 CIGS계 태양광 발전장치가 널리 사용되고 있다. In particular, the CIGS photovoltaic device, which is a pn heterojunction device having a substrate structure including a glass substrate, a metal back electrode layer, a p-type CIGS-based light absorbing portion, a high resistance buffer, an n-type window layer, and the like, is widely used.
이러한 태양광 발전장치에 있어서 낮은 저항, 높은 투과율 등의 전기적인 특성을 향상시키기 위한 연구가 진행되고 있다. 또한, 플렉서블한 태양광 발전장치에 대한 연구도 진행 중이다.In such a photovoltaic device, research is being conducted to improve electrical characteristics such as low resistance and high transmittance. In addition, research on flexible photovoltaic devices is in progress.
실시예는 단선 등이 방지되어 높은 신뢰성을 가지고, 용이하게 제조될 수 있는 태양광 발전장치 및 이의 제조방법을 제공하고자 한다.Embodiments provide a photovoltaic device and a method of manufacturing the same, which can be easily manufactured with high reliability by preventing disconnection.
일 실시예에 따른 태양광 발전장치는 기판; 상기 기판 상에 배치되는 제 1 셀; 상기 제 1 셀에 인접하는 제 2 셀; 상기 제 1 셀 및 상기 제 2 셀을 덮는 제 1 절연 필름; 및 상기 제 1 셀 및 상기 제 2 셀을 연결하는 접속 부재를 포함하며, 상기 제 1 절연 필름은 상기 제 1 셀을 노출하는 제 1 비아 홀; 및 상기 제 2 셀을 노출하는 제 2 비아홀을 포함하고, 상기 접속 부재는 상기 제 1 비아 홀 및 상기 제 2 비아 홀을 통하여, 상기 제 1 셀 및 상기 제 2 셀을 연결한다.Photovoltaic device according to one embodiment includes a substrate; A first cell disposed on the substrate; A second cell adjacent to the first cell; A first insulating film covering the first cell and the second cell; And a connection member connecting the first cell and the second cell, wherein the first insulating film comprises: a first via hole exposing the first cell; And a second via hole exposing the second cell, wherein the connection member connects the first cell and the second cell through the first via hole and the second via hole.
일 실시예에 따른 태양광 발전장치는 기판; 상기 기판 상에 배치되는 제 1 셀; 상기 제 1 셀에 인접하는 제 2 셀; 상기 제 1 셀 및 상기 제 2 셀에 연결되는 접속 부재; 및 상기 접속 부재의 외부면에 코팅되는 도금층을 포함한다.Photovoltaic device according to one embodiment includes a substrate; A first cell disposed on the substrate; A second cell adjacent to the first cell; A connection member connected to the first cell and the second cell; And a plating layer coated on an outer surface of the connection member.
일 실시예에 따른 태양광 발전장치의 제조방법은 기판 상에 서로 인접하는 제 1 셀 및 제 2 셀을 형성하는 단계; 상기 제 1 셀 및 상기 제 2 셀을 각각 노출하는 제 1 비아 홀 및 제 2 비아 홀이 형성되는 제 1 절연 필름을 형성하는 단계; 및 상기 제 1 비아 홀 및 상기 제 2 비아 홀을 통하여 상기 제 1 셀 및 상기 제 2 셀에 접속되는 접속 부재를 형성하는 단계를 포함한다.According to one or more exemplary embodiments, a method of manufacturing a solar cell apparatus includes forming first and second cells adjacent to each other on a substrate; Forming a first insulating film having a first via hole and a second via hole exposing the first cell and the second cell, respectively; And forming a connection member connected to the first cell and the second cell through the first via hole and the second via hole.
실시예에 따른 태양광 발전장치는 인접하는 셀들을 절연 필름에 형성되는 비아 홀을 통하여 접속되는 접속 부재에 의해서 연결한다. 셀들 상에 절연 필름이 배치되고, 절연 필름에 셀들을 노출하는 비아 홀들이 형성된 후, 접속 부재는 비아 홀들에 대응하여 프린팅될 수 있다.The solar cell apparatus according to the embodiment connects adjacent cells by a connecting member connected through a via hole formed in an insulating film. After the insulating film is disposed on the cells, and via holes are formed in the insulating film to expose the cells, the connection member may be printed corresponding to the via holes.
즉, 접속 부재는 프린팅 방식에 의해서 형성되기 때문에, 실시예에 따른 태양광 발전장치는 용이하게 제작될 수 있다.That is, since the connection member is formed by the printing method, the solar cell apparatus according to the embodiment can be easily manufactured.
또한, 접속 부재가 프린팅된 상태에서, 접속 부재 및 셀들에 전기 도금에 의해서 도금될 수 있다. 이에 따라서, 접속 부재는 셀들에 견고하게 접속되고, 실시예에 따른 태양광 발전장치는 단선 등을 방지한다.Further, in the state where the connection member is printed, the connection member and the cells can be plated by electroplating. Accordingly, the connection member is firmly connected to the cells, and the solar cell apparatus according to the embodiment prevents disconnection and the like.
또한, 도금층에 의해서, 접속 부재 및 셀들 사이의 접속 특성이 향상되고, 실시예에 따른 태양광 발전장치는 향상된 전기적인 특성을 가진다.In addition, by the plating layer, the connection characteristics between the connection member and the cells are improved, and the solar cell apparatus according to the embodiment has improved electrical characteristics.
따라서, 실시예에 따른 태양광 발전장치는 용이하게 형성될 수 있고, 향상된 신뢰성을 가진다.Therefore, the solar cell apparatus according to the embodiment can be easily formed and has improved reliability.
도 1은 실시예에 따른 태양전지 패널을 도시한 평면도이다.1 is a plan view illustrating a solar cell panel according to an embodiment.
도 2는 제 1 셀 및 제 2 셀이 접속된 상태를 확대하여 도시한 평면도이다.2 is an enlarged plan view illustrating a state in which a first cell and a second cell are connected.
도 3은 도 1에서 A-A`를 따라서 절단한 단면을 도시한 단면도이다.FIG. 3 is a cross-sectional view taken along the line A-A 'of FIG. 1.
도 4 내지 도 9는 실시예에 따른 태양광 발전장치를 제조하는 과정을 도시한 도면들이다.4 to 9 are views illustrating a process of manufacturing the solar cell apparatus according to the embodiment.
실시 예의 설명에 있어서, 각 기판, 층, 막 또는 전극 등이 각 기판, 층, 막, 또는 전극 등의 "상(on)"에 또는 "아래(under)"에 형성되는 것으로 기재되는 경우에 있어, "상(on)"과 "아래(under)"는 "직접(directly)" 또는 "다른 구성요소를 개재하여 (indirectly)" 형성되는 것을 모두 포함한다. 또한 각 구성요소의 상 또는 아래에 대한 기준은 도면을 기준으로 설명한다. 도면에서의 각 구성요소들의 크기는 설명을 위하여 과장될 수 있으며, 실제로 적용되는 크기를 의미하는 것은 아니다.In the description of the embodiments, where each substrate, layer, film, or electrode is described as being formed "on" or "under" of each substrate, layer, film, or electrode, etc. , "On" and "under" include both "directly" or "indirectly" formed through other components. In addition, the criteria for the top or bottom of each component will be described with reference to the drawings. The size of each component in the drawings may be exaggerated for description, and does not mean a size that is actually applied.
도 1은 실시예에 따른 태양전지 패널을 도시한 평면도이다. 도 2는 제 1 셀(C1) 및 제 2 셀(C2)이 연결된 상태를 확대하여 도시한 도면이다. 도 3은 도 1에서 A-A`를 따라서 절단한 단면을 도시한 단면도이다.1 is a plan view illustrating a solar cell panel according to an embodiment. FIG. 2 is an enlarged view of a state in which a first cell C1 and a second cell C2 are connected. FIG. 3 is a cross-sectional view taken along the line A-A 'of FIG. 1.
도 1 내지 도 3을 참조하면, 실시예에 따른 태양전지 패널은 지지기판(100), 다수 개의 셀들(C1, C2...), 제 1 절연 필름(310), 제 2 절연 필름(320), 다수 개의 접속 부재들(400), 도금층(500), 제 1 버스 바(610) 및 제 2 버스 바(620)를 포함한다.1 to 3, a solar cell panel according to an embodiment includes a support substrate 100, a plurality of cells C1, C2..., A first insulating film 310, and a second insulating film 320. The plurality of connection members 400 include a plating layer 500, a first bus bar 610, and a second bus bar 620.
상기 지지기판(100)은 상기 셀들(C1, C2...), 상기 제 1 절연 필름(310), 상기 제 2 절연 필름(320) 및 상기 접속 부재들(400)을 지지한다. 상기 지지기판(100)은 플레이트 형상을 가지며, 플렉서블하다.The support substrate 100 supports the cells C1, C2..., The first insulating film 310, the second insulating film 320, and the connection members 400. The support substrate 100 has a plate shape and is flexible.
상기 지지기판(100)은 절연체이다. 상기 지지기판(100)은 예를 들어, 스테인레스 스틸 기판 또는 에틸렌비닐아세테이트(ethylenevinylacetate;EVA) 또는 폴리이미드(polyimide;PI) 등을 포함하는 폴리머 기판일 수 있다.The support substrate 100 is an insulator. The support substrate 100 may be, for example, a stainless steel substrate or a polymer substrate including ethylene vinyl acetate (EVA), polyimide (PI), or the like.
상기 셀들(C1, C2...)은 상기 지지기판(100) 상에 배치된다. 상기 셀들(C1, C2...)은 서로 이격되어 매트릭스 형태로 배치될 수 있다. 이와는 다르게, 상기 셀들(C1, C2...)은 일 방향으로 연장되는 형상을 가질 수 있고, 스트라이프 형태로 배치될 수 있다.The cells C1, C2... Are disposed on the support substrate 100. The cells C1, C2... May be spaced apart from each other and arranged in a matrix form. Alternatively, the cells C1, C2... May have a shape extending in one direction and may be arranged in a stripe shape.
상기 셀들(C1, C2...)은 서로 직렬 또는 병렬로 연결된다. 더 자세하게, 서로 이격된 상기 셀들(C1, C2...)은 상기 접속 부재들(400), 상기 제 1 버스 바(610) 및 상기 제 2 버스 바(620)에 의해서 서로 직렬 또는 병렬로 연결된다.The cells C1, C2 ... are connected in series or in parallel with each other. In more detail, the cells C1, C2..., Spaced apart from each other are connected in series or in parallel with each other by the connection members 400, the first bus bar 610, and the second bus bar 620. do.
상기 셀들(C1, C2...)은 태양광을 입사받아 전기에너지로 변환시킨다. 예를 들어, 상기 셀들(C1, C2...)은 실리콘계 태양전지, CIGS계 태양전지와 같은 반도체 화합물계 태양전지 및 염료 감응 태양전지일 수 있다.The cells C1, C2 ... receive sunlight and convert it into electrical energy. For example, the cells C1, C2 ... may be a silicon compound solar cell, a semiconductor compound solar cell such as a CIGS solar cell, and a dye-sensitized solar cell.
상기 각각의 셀(C1, C2...)은 후면전극(210), 광 흡수부(220), 버퍼(230), 고저항 버퍼(240) 및 윈도우(250)를 포함할 수 있다.Each cell C1, C2... May include a back electrode 210, a light absorbing unit 220, a buffer 230, a high resistance buffer 240, and a window 250.
상기 후면전극(210)은 상기 지지기판(100) 상에 배치된다. 상기 후면전극(210)은 도전층이며, 상기 후면전극(210)으로 사용되는 물질의 예로서는 몰리브덴 등을 들 수 있다.The back electrode 210 is disposed on the support substrate 100. The back electrode 210 is a conductive layer, and examples of the material used as the back electrode 210 may include molybdenum and the like.
상기 후면전극(210)은 상대적으로 큰 면적을 가진다. 즉, 상기 후면전극(210)은 상기 광 흡수부(220), 상기 버퍼(230), 상기 고저항 버퍼(240) 및 상기 윈도우(250)보다 더 큰 면적을 가진다.The back electrode 210 has a relatively large area. That is, the back electrode 210 has a larger area than the light absorbing part 220, the buffer 230, the high resistance buffer 240, and the window 250.
이에 따라서, 상기 후면전극(210)의 상면의 일부가 노출된다. 즉, 상기 후면전극(210)의 일부는 상기 광 흡수부(220)의 측면에 대하여 측방으로 돌출된다.Accordingly, a part of the top surface of the back electrode 210 is exposed. That is, part of the back electrode 210 protrudes laterally with respect to the side surface of the light absorbing unit 220.
상기 광 흡수부(220)는 상기 후면전극층 상에 배치된다. 상기 광 흡수부(220)는 상기 윈도우(250)를 통하여 입사되는 태양광을 흡수한다. 상기 광 흡수부(220)는 예를 들어, 상기 광 흡수부(220)는 Ⅰ-Ⅲ-Ⅵ족 계 화합물을 포함할 수 있다. 예를 들어, 상기 광 흡수부(220)는 구리-인듐-갈륨-셀레나이드계(Cu(In,Ga)Se2;CIGS계) 결정 구조, 구리-인듐-셀레나이드계 또는 구리-갈륨-셀레나이드계 결정 구조를 가질 수 있다.The light absorbing part 220 is disposed on the back electrode layer. The light absorbing part 220 absorbs sunlight incident through the window 250. For example, the light absorbing unit 220 may include the group I-III-VI compound. For example, the light absorbing unit 220 may be formed of a copper-indium-gallium-selenide-based (Cu (In, Ga) Se 2 ; CIGS-based) crystal structure, copper-indium-selenide, or copper-gallium-selenium. It may have a amide crystal structure.
상기 광 흡수부(220)의 에너지 밴드갭(band gap)은 약 1eV 내지 1.8eV일 수 있다.The energy band gap of the light absorbing unit 220 may be about 1 eV to 1.8 eV.
상기 버퍼(230)는 상기 광 흡수부(220) 상에 배치된다. 상기 버퍼(230)는 황화 카드뮴(CdS)를 포함하며, 상기 버퍼(230)의 에너지 밴드갭은 약 2.2eV 내지 2.4eV이다.The buffer 230 is disposed on the light absorbing part 220. The buffer 230 includes cadmium sulfide (CdS), and the energy bandgap of the buffer 230 is about 2.2 eV to 2.4 eV.
상기 고저항 버퍼(240)는 상기 버퍼(230) 상에 배치된다. 또한, 상기 고저항 버퍼(240)는 불순물이 도핑되지 않은 징크 옥사이드(i-ZnO)를 포함한다. 상기 고저항 버퍼(240)의 에너지 밴드갭은 약 3.1eV 내지 3.3eV이다.The high resistance buffer 240 is disposed on the buffer 230. In addition, the high resistance buffer 240 includes zinc oxide (i-ZnO) that is not doped with impurities. The energy bandgap of the high resistance buffer 240 is about 3.1 eV to 3.3 eV.
상기 윈도우(250)은 상기 고저항 버퍼(240) 상에 배치된다. 상기 윈도우(250)은 투명하며, 도전층이다. 또한, 상기 윈도우(250)의 저항은 상기 이면전극(210)의 저항보다 높다. 예를 들어, 상기 윈도우(250)의 저항은 상기 이면전극(210)의 저항보다 약 10배 내지 200배 더 클 수 있다.The window 250 is disposed on the high resistance buffer 240. The window 250 is transparent and is a conductive layer. In addition, the resistance of the window 250 is higher than that of the back electrode 210. For example, the resistance of the window 250 may be about 10 to 200 times greater than the resistance of the back electrode 210.
상기 윈도우(250)은 알루미늄 도핑된 징크 옥사이드(Al doped zinc oxide;AZO) 또는 갈륨 도핑된 징크 옥사이드(Ga doped zinc oxide;GZO) 등을 포함할 수 있다. 상기 윈도우(250)의 두께는 약 800㎚ 내지 약 1200㎚일 수 있다.The window 250 may include aluminum doped zinc oxide (AZO), gallium doped zinc oxide (GZO), or the like. The window 250 may have a thickness of about 800 nm to about 1200 nm.
상기 광 흡수부(220), 상기 버퍼(230), 상기 고저항 버퍼(240) 및 상기 윈도우(250)는 실질적으로 동일한 면적을 가질 수 있다. 이때, 상기 광 흡수부(220), 상기 버퍼(230), 상기 고저항 버퍼(240) 및 상기 윈도우(250)의 면적은 상기 후면전극(210)의 면적보다 더 작을 수 있다.The light absorbing unit 220, the buffer 230, the high resistance buffer 240, and the window 250 may have substantially the same area. In this case, an area of the light absorbing part 220, the buffer 230, the high resistance buffer 240, and the window 250 may be smaller than that of the back electrode 210.
이에 따라서, 상기 광 흡수부(220)는 상기 후면전극(210) 상에 계단 형상을 형성하며 적층될 수 있다. 즉, 상기 광 흡수부(220)는 상기 후면전극(210)과 단차를 형성할 수 있다. 상기 버퍼(230), 상기 고저항 버퍼(240) 및 상기 윈도우층(252)은 상기 후면전극(210)과 단차를 형성하지 않는다. 즉, 상기 광 흡수부(220), 상기 버퍼(230), 상기 고저항 버퍼(240) 및 상기 윈도우층(252)의 외곽은 서로 실질적으로 일치할 수 있다.Accordingly, the light absorbing part 220 may be stacked while forming a step shape on the back electrode 210. That is, the light absorbing unit 220 may form a step with the back electrode 210. The buffer 230, the high resistance buffer 240, and the window layer 252 do not form a step with the back electrode 210. That is, the outside of the light absorbing unit 220, the buffer 230, the high resistance buffer 240, and the window layer 252 may substantially coincide with each other.
상기 후면전극(210)은 상기 광 흡수부(220)으로부터 노출되는 노출 영역(OA)이 형성된다. 즉, 상기 노출 영역(OA)은 상기 후면전극(210)의 상면 중 상기 광 흡수부(220)가 배치되지 않는 영역이다.The back electrode 210 has an exposed area OA exposed from the light absorbing part 220. That is, the exposed area OA is an area where the light absorbing part 220 is not disposed on the top surface of the back electrode 210.
상기 제 1 절연 필름(310)은 상기 지지기판(100) 상에 배치된다. 상기 제 1 절연 필름(310)은 상기 셀들(C1, C2...)을 덮는다. 더 자세하게, 상기 제 1 절연 필름(310)은 상기 셀들(C1, C2...) 상에 배치된다. 상기 제 1 절연 필름(310)은 상기 셀들(C1, C2...) 전체를 덮을 수 있다. 또한, 상기 제 1 절연 필름(310)은 상기 셀들(C1, C2...) 및 상기 지지기판(100)에 밀착될 수 있다.The first insulating film 310 is disposed on the support substrate 100. The first insulating film 310 covers the cells C1, C2... In more detail, the first insulating film 310 is disposed on the cells C1, C2... The first insulating film 310 may cover the entirety of the cells C1, C2... In addition, the first insulating film 310 may be in close contact with the cells C1, C2... And the support substrate 100.
상기 제 1 절연 필름(310)은 투명하며 절연체이다. 상기 제 1 절연 필름(310)으로 사용되는 물질의 예로서는 에틸렌비닐아세테이트 등을 들 수 있다.The first insulating film 310 is transparent and insulator. Ethylene vinyl acetate may be used as an example of the material used for the first insulating film 310.
상기 제 1 절연 필름(310)에는 다수 개의 제 1 비아 홀들(311) 및 다수 개의 제 2 비아 홀들(312)을 포함한다.The first insulating film 310 includes a plurality of first via holes 311 and a plurality of second via holes 312.
상기 제 1 비아 홀들(311)은 상기 제 1 절연 필름(310)을 관통하며, 상기 셀들(C1, C2...)의 일부를 각각 노출한다. 더 자세하게, 상기 제 1 비아 홀들(311)은 상기 셀들(C1, C2...)의 윈도우(250)의 상면을 노출한다. 상기 제 1 비아 홀들(311)은 상기 셀들(C1, C2...)의 윈도우(250)의 외곽에 대응하여 형성될 수 있다.The first via holes 311 pass through the first insulating film 310 and expose portions of the cells C1, C2... In more detail, the first via holes 311 expose the top surface of the window 250 of the cells C1, C2... The first via holes 311 may be formed to correspond to the periphery of the window 250 of the cells C1, C2...
상기 제 2 비아 홀들(312)은 상기 제 1 절연 필름(310)을 관통하며, 상기 셀들(C1, C2...)의 다른 일부를 각각 노출한다. 더 자세하게, 상기 제 2 비아 홀들(312)은 상기 셀들(C1, C2...)의 후면전극(210)의 상면을 노출한다. 더 자세하게, 상기 제 2 비아 홀들(312)은 상기 노출 영역(OA)에 대응하여 형성된다.The second via holes 312 pass through the first insulating film 310 and expose other portions of the cells C1, C2... In more detail, the second via holes 312 expose the top surface of the back electrode 210 of the cells C1, C2. In more detail, the second via holes 312 are formed corresponding to the exposed area OA.
상기 제 2 절연 필름(320)은 상기 제 1 절연 필름(310) 상에 배치된다. 상기 제 2 절연 필름(320)은 상기 접속 부재들(400), 상기 제 1 버스 바(610) 및 상기 제 2 버스 바(620)를 덮을 수 있다. 상기 제 2 절연 필름(320)은 상기 제 1 절연 필름(310) 상면 전체를 덮을 수 있다.The second insulating film 320 is disposed on the first insulating film 310. The second insulating film 320 may cover the connection members 400, the first bus bar 610, and the second bus bar 620. The second insulating film 320 may cover the entire upper surface of the first insulating film 310.
또한, 상기 제 2 절연 필름(320)은 상기 제 1 절연 필름(310)에 밀착될 수 있다. 상기 제 2 절연 필름(320)은 상기 셀들(C1, C2...), 상기 접속 부재들(400), 상기 제 1 버스 바(610) 및 상기 제 2 버스 바(620)를 외부에 대하여 밀봉할 수 있다.In addition, the second insulating film 320 may be in close contact with the first insulating film 310. The second insulating film 320 seals the cells C1, C2..., The connection members 400, the first bus bar 610, and the second bus bar 620 with respect to the outside. can do.
상기 제 2 절연 필름(320)은 투명하며, 절연체이다. 또한, 상기 제 2 절연 필름(320)은 플렉서블하며 높은 내구성을 가질 수 있다. 또한, 상기 제 2 절연 필름(320)은 상기 제 1 절연 필름(310)과 동일한 물질로 형성될 수 있다. 상기 제 2 절연 필름(320)으로 사용되는 물질의 예로서는 에틸렌 비닐 아세테이트, 폴리이미드 또는 폴리에틸렌테레프탈레이트 등을 들 수 있다.The second insulating film 320 is transparent and is an insulator. In addition, the second insulating film 320 may be flexible and have high durability. In addition, the second insulating film 320 may be formed of the same material as the first insulating film 310. Examples of the material used as the second insulating film 320 may include ethylene vinyl acetate, polyimide or polyethylene terephthalate.
상기 접속 부재들(400)은 상기 셀들(C1, C2...) 사이에 각각 배치된다. 또한, 상기 접속 부재들(400)은 상기 제 1 절연 기판 상, 상기 제 1 비아 홀들(311) 내측 및 상기 제 2 비아 홀들(312) 내측에 배치된다.The connection members 400 are disposed between the cells C1, C2... In addition, the connection members 400 are disposed on the first insulating substrate, inside the first via holes 311, and inside the second via holes 312.
상기 접속 부재들(400)은 상기 셀들(C1, C2...)을 서로 연결시킨다. 더 자세하게, 상기 접속 부재들(400)은 서로 인접하는 셀들(C1, C2...)을 연결시킨다. 상기 접속 부재들(400)은 상기 제 1 비아 홀들(311) 및 상기 제 2 비아 홀들(312)을 통하여 서로 인접하는 셀들(C1, C2...)을 연결시킨다. 즉, 상기 접속 부재들(400)은 상기 제 1 비아 홀들(311) 및 상기 제 2 비아 홀들(312)을 통하여 상기 셀들(C1, C2...)에 접속된다.The connection members 400 connect the cells C1, C2... In more detail, the connection members 400 connect adjacent cells C1, C2... The connection members 400 connect the cells C1, C2... Which are adjacent to each other through the first via holes 311 and the second via holes 312. That is, the connection members 400 are connected to the cells C1, C2... Through the first via holes 311 and the second via holes 312.
상기 접속 부재들(400)은 상기 셀들(C1, C2...)을 직렬로 연결시킨다. 즉, 상기 접속 부재들(400)은 하나의 셀의 윈도우(250)를 인접하는 셀의 후면전극(210)에 연결시킨다. 상기 접속 부재들(400)은 상기 제 1 비아 홀들(311) 및 상기 제 2 비아 홀들(312)을 덮는다. 즉, 하나의 접속 부재(400)는 하나의 제 1 비아 홀(311) 및 하나의 제 2 비아 홀(312)을 동시에 덮는다.The connection members 400 connect the cells C1, C2... In series. That is, the connection members 400 connect the window 250 of one cell to the back electrode 210 of the adjacent cell. The connection members 400 cover the first via holes 311 and the second via holes 312. That is, one connection member 400 simultaneously covers one first via hole 311 and one second via hole 312.
상기 접속 부재들(400)은 도전체이다. 상기 접속 부재들(400)은 예를 들어, 도전성 페이스트 또는 도전 테이프 일 수 있다. 더 자세하게, 상기 접속 부재들(400)은 예를 들어, 은(Ag) 페이스트 또는 구리 플레이트 일 수 있다.The connection members 400 are conductors. The connection members 400 may be, for example, conductive paste or conductive tape. In more detail, the connection members 400 may be, for example, silver (Ag) paste or copper plate.
상기 접속 부재들(400)은 플렉서블하다. 즉, 상기 접속 부재들(400)은 상기 지지기판(100)이 휘어짐에 따라서 만곡될 수 있다.The connection members 400 are flexible. That is, the connection members 400 may be curved as the support substrate 100 is bent.
상기 접속 부재들(400)은 상기 제 1 비아 홀들(311) 및 상기 제 2 비아 홀들(312)을 통하여 상기 셀들(C1, C2...)에 각각 연결된다. 즉, 상기 접속 부재들(400)의 일부는 상기 제 1 비아 홀들(311) 및 상기 제 2 비아 홀들(312) 내측에 배치되어, 상기 셀들(C1, C2...)에 접속된다.The connection members 400 are connected to the cells C1, C2... Through the first via holes 311 and the second via holes 312, respectively. That is, some of the connection members 400 are disposed inside the first via holes 311 and the second via holes 312, and are connected to the cells C1, C2...
예를 들어, 도 1 내지 도 3 에 도시된 바와 같이, 상기 접속 부재들(400) 중 하나는 제 1 셀(C1) 및 제 2 셀(C2)을 서로 직렬로 연결할 수 있다. 상기 제 1 셀(C1) 및 상기 제 2 셀(C2)은 서로 인접하여 배치된다. 상기 제 1 비아 홀들(311) 중 하나는 상기 제 1 셀(C1)의 윈도우(251)의 일부를 노출하고, 상기 제 2 비아 홀들(312) 중 하나는 상기 제 2 셀(C2)의 후면전극(211)의 상면의 일부를 노출한다.For example, as illustrated in FIGS. 1 to 3, one of the connection members 400 may connect the first cell C1 and the second cell C2 in series with each other. The first cell C1 and the second cell C2 are disposed adjacent to each other. One of the first via holes 311 exposes a portion of the window 251 of the first cell C1, and one of the second via holes 312 is a back electrode of the second cell C2. A part of the upper surface of 211 is exposed.
상기 접속 부재(400)는 상기 제 1 비아 홀(311)을 통하여 상기 제 1 셀(C1)의 윈도우(250)에 접속된다. 이때, 상기 접속 부재(400)는 상기 제 1 셀(C1)의 윈도우(250)에 직접적인 접촉에 의해서 접속될 수 있다.The connection member 400 is connected to the window 250 of the first cell C1 through the first via hole 311. In this case, the connection member 400 may be connected to the window 250 of the first cell C1 by direct contact.
또한, 상기 접속 부재(400)는 상기 제 2 비아 홀(312)을 통하여 상기 제 2 셀(C2)의 후면전극(210)의 노출 영역(OA)에 접속된다. 이때, 상기 접속 부재(400)는 상기 제 2 셀(C2)의 후면전극(210)에 직접적인 접촉에 의해서 접속될 수 있다.In addition, the connection member 400 is connected to the exposed area OA of the back electrode 210 of the second cell C2 through the second via hole 312. In this case, the connection member 400 may be connected by direct contact with the back electrode 210 of the second cell C2.
상기 도금층(500)은 상기 접속 부재들(400)의 주위를 둘러싼다. 또한, 상기 도금층(500)은 상기 제 1 비아 홀들(311)에 의해서 노출된 상기 셀들(C1, C2...)의 윈도우(250) 상에 배치된다. 또한, 상기 도금층(500)은 상기 제 2 비아 홀들(312)에 노출된 상기 셀들(C1, C2...)의 후면전극(210)의 상면에 배치된다. 또한, 상기 도금층(500)은 상기 접속 부재들(400) 및 상기 셀들(C1, C2...)의 윈도우(250) 사이에 개재될 수 있다. 또한, 상기 도금층(500)은 상기 접속 부재들(400) 및 상기 셀들(C1, C2...)의 후면전극(210) 사이에 개재될 수 있다.The plating layer 500 surrounds the connection members 400. In addition, the plating layer 500 is disposed on the window 250 of the cells C1, C2... Exposed by the first via holes 311. In addition, the plating layer 500 is disposed on the top surface of the back electrode 210 of the cells C1, C2..., Exposed to the second via holes 312. In addition, the plating layer 500 may be interposed between the connection members 400 and the windows 250 of the cells C1, C2. In addition, the plating layer 500 may be interposed between the connection members 400 and the rear electrodes 210 of the cells C1, C2.
상기 접속 부재들(400)은 상기 도금층(500)을 통하여 상기 셀들(C1, C2...)의 윈도우(250) 및 상기 셀들(C1, C2...)의 후면전극(210)에 접속될 수 있다. 즉, 상기 도금층(500)은 상기 접속 부재들(400) 및 상기 셀들(C1, C2...)의 윈도우(250) 사이에 개재되어, 상기 접속 부재들(400) 및 상기 셀들(C1, C2...)의 윈도우(250) 사이의 전기적 및 기계적인 접속 특성을 향상시킨다. 마찬가지로, 상기 도금층(500)은 상기 접속 부재들(400) 및 상기 셀들(C1, C2...)의 후면전극(210) 사이에 개재되어, 상기 접속 부재들(400) 및 상기 셀들(C1, C2...)의 윈도우(250) 사이의 전기적 및 기계적인 특성을 향상시킨다.The connection members 400 may be connected to the window 250 of the cells C1, C2... And the back electrode 210 of the cells C1, C2... Through the plating layer 500. Can be. That is, the plating layer 500 is interposed between the connection members 400 and the window 250 of the cells C1, C2..., The connection members 400 and the cells C1, C2. To improve the electrical and mechanical connection properties between the windows 250. Similarly, the plating layer 500 is interposed between the connection members 400 and the rear electrodes 210 of the cells C1, C2..., The connection members 400 and the cells C1, Improve the electrical and mechanical properties between windows 250 of C2 ...).
즉, 상기 도금층(500)은 상기 접속 부재들(400), 상기 셀들(C1, C2...)의 윈도우(250) 및 상기 셀들(C1, C2...)의 후면전극(210)에 도금되어 형성될 수 있다.That is, the plating layer 500 is plated on the connection members 400, the window 250 of the cells C1, C2..., And the back electrode 210 of the cells C1, C2. Can be formed.
상기 도금층(500)은 도전층이며, 낮은 저항의 금속을 포함할 수 있다. 상기 도금층(500)으로 사용되는 물질의 예로서는 구리, 은 또는 금 등을 들 수 있다.The plating layer 500 is a conductive layer, and may include a metal of low resistance. Examples of the material used for the plating layer 500 may include copper, silver, or gold.
상기 제 1 버스 바(610)는 상기 셀들(C1, C2...)을 병렬로 연결한다. 더 자세하게, 상기 제 1 버스 바(610)는 외곽에 배치되는 셀들(C1, C2...)의 후면전극(210)에 연결될 수 있다. 상기 제 1 버스 바(610)는 상기 제 1 절연 필름(310) 및 상기 셀들(C1, C2...)의 후면전극(210) 사이에 배치될 수 있다. 상기 제 1 버스 바(610)는 연장되는 형상을 가지며, 인접하는 태양전지 패널 또는 외부의 축전 장치 등에 연결될 수 있다.The first bus bar 610 connects the cells C1, C2... In parallel. In more detail, the first bus bar 610 may be connected to the rear electrode 210 of the cells C1, C2... The first bus bar 610 may be disposed between the first insulating film 310 and the rear electrodes 210 of the cells C1, C2... The first bus bar 610 may have an extended shape and may be connected to an adjacent solar cell panel or an external power storage device.
상기 제 2 버스 바(620)는 상기 셀들(C1, C2...)을 병렬로 연결한다. 더 자세하게, 상기 제 1 버스 바(610)는 다른 외곽에 배치되는 셀들(C1, C2...)의 윈도우(250)에 연결될 수 있다. 상기 제 2 버스 바(620)는 제 1 절연 필름(310) 및 상기 셀들(C1, C2...)의 윈도우(250) 사이에 배치될 수 있다. 상기 제 2 버스 바(620)는 연장되는 형상을 가지며, 인접하는 태양전지 패널 또는 외부의 축전 장치 등에 연결될 수 있다.The second bus bar 620 connects the cells C1, C2... In parallel. In more detail, the first bus bar 610 may be connected to the window 250 of the cells C1, C2... The second bus bar 620 may be disposed between the first insulating film 310 and the window 250 of the cells C1, C2... The second bus bar 620 may have an extended shape and may be connected to an adjacent solar cell panel or an external power storage device.
제 1 버스 바(610) 및 제 2 버스 바(620)는 도전체이며, 상기 제 1 버스 바(610) 및 상기 제 2 버스 바(620)로 사용되는 물질의 예로서는 구리 또는 은 등을 들 수 있다. 상기 버스 바 및 상기 제 2 버스 바(620)는 페이스트 또는 도전 테이프 형태로 제작될 수 있다.The first bus bar 610 and the second bus bar 620 are conductors, and examples of the material used as the first bus bar 610 and the second bus bar 620 include copper or silver. have. The bus bar and the second bus bar 620 may be manufactured in the form of a paste or a conductive tape.
상기 접속 부재들(400)은 인접하는 셀들(C1, C2...)을 상기 제 1 비아 홀들(311) 및 상기 제 2 비아 홀들(312)을 통하여 연결한다. 특히, 상기 접속 부재들(400)은 상기 셀들(C1, C2...)의 윈도우(250)의 상면 및 후면전극(210)의 상면에 접속된다. 이에 따라서, 상기 접속 부재들(400)은 페이스트 등이 프린팅되어 형성될 수 있다.The connection members 400 connect adjacent cells C1, C2... Through the first via holes 311 and the second via holes 312. In particular, the connection members 400 are connected to an upper surface of the window 250 of the cells C1, C2..., And an upper surface of the rear electrode 210. Accordingly, the connection members 400 may be formed by printing paste.
즉, 상기 접속 부재들(400)은 프린팅 방식에 의해서 형성되기 때문에, 실시예에 따른 태양광 발전장치는 자동화 공정 등에 의해서 용이하게 제작될 수 있다.That is, since the connection members 400 are formed by a printing method, the solar cell apparatus according to the embodiment may be easily manufactured by an automated process.
또한, 상기 접속 부재들(400)이 프린팅된 상태에서, 상기 접속 부재들(400) 및 상기 셀들(C1, C2...)에 전기 도금에 의해서 상기 도금층(500)이 형성될 수 있다. 이에 따라서, 상기 접속 부재들(400)은 상기 셀들(C1, C2...)에 견고하게 접속되고, 실시예에 따른 태양전지 패널은 단선 등을 방지한다.In addition, in the state in which the connection members 400 are printed, the plating layer 500 may be formed by electroplating on the connection members 400 and the cells C1, C2. Accordingly, the connection members 400 are firmly connected to the cells C1, C2..., And the solar cell panel according to the embodiment prevents disconnection.
또한, 상기 도금층(500)에 의해서, 상기 접속 부재들(400) 및 상기 셀들(C1, C2...) 사이의 접속 특성이 향상되고, 실시예에 따른 태양전지 패널은 향상된 전기적 및 기계적인 특성을 가진다.In addition, by the plating layer 500, the connection characteristics between the connection members 400 and the cells (C1, C2 ...) is improved, the solar cell panel according to the embodiment has improved electrical and mechanical Has
따라서, 실시예에 따른 태양전지 패널은 용이하게 형성될 수 있고, 향상된 신뢰성을 가진다.Therefore, the solar cell panel according to the embodiment can be easily formed and has improved reliability.
도 4 내지 도 9는 실시예에 따른 태양전지 패널을 제조하는 과정을 도시한 도면들이다. 본 제조 방법에 대한 설명에, 앞서 설명한 태양전지 패널에 대한 설명이 본질적으로 결합될 수 있다.4 to 9 are views illustrating a process of manufacturing the solar cell panel according to the embodiment. In the description of the present manufacturing method, the description of the solar cell panel described above may be essentially combined.
도 4를 참조하면, 지지기판(100) 상에 다수 개의 후면전극들(210)이 형성된다.Referring to FIG. 4, a plurality of back electrodes 210 are formed on the support substrate 100.
상기 후면전극들(210)이 형성되기 위해서, 상기 지지기판(100) 상에 후면전극층이 형성된다. 상기 후면전극층은 스퍼터링 등과 같은 진공 증착 공정에 의해서, 상기 지지기판(100) 상에 몰리브덴이 증착되어 형성될 수 있다.In order to form the back electrodes 210, a back electrode layer is formed on the support substrate 100. The back electrode layer may be formed by depositing molybdenum on the support substrate 100 by a vacuum deposition process such as sputtering.
이후, 상기 후면전극층은 레이저 등에 의해서 패터닝되어, 상기 후면전극층은 상기 후면전극들(210)로 구분된다.Thereafter, the back electrode layer is patterned by a laser or the like, and the back electrode layer is divided into the back electrodes 210.
도 5를 참조하면, 상기 이면전극들 상에 광 흡수층(221), 버퍼층(231), 고저항 버퍼층(241) 및 윈도우층(252)이 형성된다.Referring to FIG. 5, a light absorbing layer 221, a buffer layer 231, a high resistance buffer layer 241, and a window layer 252 are formed on the back electrodes.
상기 광 흡수층(221)은 스퍼터링 공정 또는 증발법 등에 의해서 형성될 수 있다.The light absorbing layer 221 may be formed by a sputtering process or an evaporation method.
예를 들어, 상기 광 흡수층(221)을 형성하기 위해서 구리, 인듐, 갈륨, 셀레늄을 동시 또는 구분하여 증발시키면서 구리-인듐-갈륨-셀레나이드계(Cu(In,Ga)Se2;CIGS계)의 광 흡수층(221)을 형성하는 방법과 금속 프리커서 막을 형성시킨 후 셀레니제이션(Selenization) 공정에 의해 형성시키는 방법이 폭넓게 사용되고 있다.For example, copper, indium, gallium, selenide-based (Cu (In, Ga) Se 2 ; CIGS-based) while evaporating copper, indium, gallium, and selenium simultaneously or separately to form the light absorbing layer 221. The method of forming the light absorbing layer 221 and the method of forming the metal precursor film by the selenization process are widely used.
금속 프리커서 막을 형성시킨 후 셀레니제이션 하는 것을 세분화하면, 구리 타겟, 인듐 타겟, 갈륨 타겟을 사용하는 스퍼터링 공정에 의해서, 상기 이면전극들(210) 상에 금속 프리커서 막이 형성된다.When the metal precursor film is formed and then selenization is subdivided, a metal precursor film is formed on the back electrodes 210 by a sputtering process using a copper target, an indium target, and a gallium target.
이후, 상기 금속 프리커서 막은 셀레이제이션(selenization) 공정에 의해서, 구리-인듐-갈륨-셀레나이드계(Cu(In,Ga)Se2;CIGS계)의 광 흡수층(221)이 형성된다.Thereafter, the metal precursor film is formed of a copper-indium-gallium-selenide-based (Cu (In, Ga) Se 2 ; CIGS-based) light absorbing layer 221 by a selenization process.
이와는 다르게, 상기 구리 타겟, 인듐 타겟, 갈륨 타겟을 사용하는 스퍼터링 공정 및 상기 셀레니제이션 공정은 동시에 진행될 수 있다.Alternatively, the sputtering process and the selenization process using the copper target, the indium target, and the gallium target may be simultaneously performed.
이와는 다르게, 구리 타겟 및 인듐 타겟 만을 사용하거나, 구리 타겟 및 갈륨 타겟을 사용하는 스퍼터링 공정 및 셀레니제이션 공정에 의해서, CIS계 또는 CIG계 광 흡수층이 형성될 수 있다.Alternatively, a CIS-based or CIG-based light absorbing layer may be formed by using only a copper target and an indium target, or by a sputtering process and a selenization process using a copper target and a gallium target.
이후, 황화 카드뮴이 스퍼터링 공정 또는 용액성장법(chemical bath depositon;CBD) 등에 의해서 증착되고, 상기 버퍼층(231)이 형성된다.Thereafter, cadmium sulfide is deposited by a sputtering process or a chemical bath depositon (CBD) or the like, and the buffer layer 231 is formed.
이후, 상기 버퍼층(231) 상에 징크 옥사이드가 스퍼터링 공정 등에 의해서 증착되고, 상기 고저항 버퍼층(241)이 형성된다.Thereafter, zinc oxide is deposited on the buffer layer 231 by a sputtering process, and the high resistance buffer layer 241 is formed.
상기 버퍼층(231) 및 상기 고저항 버퍼층(241)은 낮은 두께로 증착된다. 예를 들어, 상기 버퍼층(231) 및 상기 고저항 버퍼층(241)의 두께는 약 1㎚ 내지 약 80㎚이다.The buffer layer 231 and the high resistance buffer layer 241 are deposited to a low thickness. For example, the thickness of the buffer layer 231 and the high resistance buffer layer 241 is about 1 nm to about 80 nm.
이후, 상기 고저항 버퍼층(241) 상에 투명한 도전물질이 증착되어 상기 윈도우층(252)이 형성된다. 예를 들어, 상기 윈도우층(252)은 알루미늄이 도핑된 징크옥사이드가 스퍼터링 공정에 의해서 상기 고저항 버퍼(240)층 상에 증착되어 형성될 수 있다.Thereafter, a transparent conductive material is deposited on the high resistance buffer layer 241 to form the window layer 252. For example, the window layer 252 may be formed by depositing aluminum-doped zinc oxide on the high resistance buffer 240 layer by a sputtering process.
도 6을 참조하면, 상기 광 흡수층(221), 상기 버퍼층(231), 상기 고저항 버퍼(240)층 및 상기 윈도우층(252)은 레이저 또는 기계적인 스크라이빙 등에 의해서 패터닝된다. 더 자세하게, 상기 광 흡수층(221), 상기 버퍼층(231), 상기 고저항 버퍼(240)층 및 상기 윈도우층(252)은 한꺼번에 패터닝될 수 있다. 이에 따라서, 다수 개의 광 흡수부들(220), 다수 개의 버퍼들(230), 다수 개의 고저항 버퍼들(240) 및 다수 개의 윈도우들(250)이 형성된다.Referring to FIG. 6, the light absorbing layer 221, the buffer layer 231, the high resistance buffer 240 layer, and the window layer 252 are patterned by laser or mechanical scribing. In more detail, the light absorbing layer 221, the buffer layer 231, the high resistance buffer 240 layer, and the window layer 252 may be patterned at a time. Accordingly, a plurality of light absorbing parts 220, a plurality of buffers 230, a plurality of high resistance buffers 240, and a plurality of windows 250 are formed.
이에 따라서, 상기 지지기판(100) 상에 상기 후면전극(210), 상기 광 흡수부(220), 상기 버퍼(230), 상기 고저항 버퍼(240) 및 상기 윈도우(250)를 포함하는 다수 개의 셀들(C1, C2...)이 형성된다.Accordingly, the back electrode 210, the light absorbing unit 220, the buffer 230, the high resistance buffer 240 and the window 250 on the support substrate 100 Cells C1, C2 ... are formed.
이때, 상기 광 흡수층(221), 상기 버퍼층(231), 상기 고저항 버퍼층(241) 및 상기 윈도우층(252)은 상기 후면전극들(210)의 상면의 일부를 노출하도록 패터닝된다. 이에 따라서, 상기 후면전극들(210)의 상면에는 노출 영역(OA)이 형성된다.In this case, the light absorbing layer 221, the buffer layer 231, the high resistance buffer layer 241, and the window layer 252 are patterned to expose portions of the top surfaces of the back electrodes 210. Accordingly, an exposed area OA is formed on the top surfaces of the back electrodes 210.
따라서, 상기 후면전극들(210) 및 상기 광 흡수부들(220)은 계단 형상으로 적층되는 구조를 가진다.Therefore, the back electrodes 210 and the light absorbing parts 220 have a structure stacked in a step shape.
도 7을 참조하면, 상기 셀들(C1, C2...) 상에 제 1 절연 필름(310)이 형성된다. 즉, 상기 셀들(C1, C2...)이 형성된 지지기판(100) 상에 상기 제 1 절연 필름(310)이 합착된다. 이후, 상기 제 1 절연 필름(310)에는 다수 개의 제 1 비아 홀들(311) 및 다수 개의 제 2 비아 홀들(312)이 형성된다.Referring to FIG. 7, a first insulating film 310 is formed on the cells C1, C2. That is, the first insulating film 310 is bonded to the support substrate 100 on which the cells C1, C2... Thereafter, a plurality of first via holes 311 and a plurality of second via holes 312 are formed in the first insulating film 310.
상기 제 1 비아 홀들(311)은 상기 윈도우들(250)의 상면을 노출하고, 상기 제 2 비아 홀들(312)은 상기 후면전극들(210)의 노출 영역(OA)을 노출한다.The first via holes 311 expose the top surfaces of the windows 250, and the second via holes 312 expose the exposed areas OA of the back electrodes 210.
도 8을 참조하면, 상기 제 1 절연 필름(310) 상에 다수 개의 접속 부재들(400)이 형성된다. 상기 접속 부재들(400)은 실크 스크린 인쇄 등과 같은 프린팅 방식의 의해서 형성된다.Referring to FIG. 8, a plurality of connection members 400 are formed on the first insulating film 310. The connection members 400 are formed by a printing method such as silk screen printing.
즉, 금속 입자 등과 같은 도전성 입자들을 포함하는 도전성 페이스트가 상기 셀들(C1, C2...) 사이에 프린트될 수 있다. 또한, 상기 도전성 페이스트는 상기 제 1 비아 홀들(311) 및 상기 제 2 비아 홀들(312)을 덮도록 프린트될 수 있다. 이에 따라서, 상기 접속 부재들(400)이 형성된다.That is, a conductive paste including conductive particles such as metal particles may be printed between the cells C1, C2... In addition, the conductive paste may be printed to cover the first via holes 311 and the second via holes 312. Accordingly, the connection members 400 are formed.
이후, 상기 접속 부재들(400)은 건조 공정 및 열처리 공정을 따로 더 거칠 수 있다.Thereafter, the connection members 400 may be rougher separately in a drying process and a heat treatment process.
도 9를 참조하면, 도금층(500)이 형성되고, 상기 제 1 절연 필름(310) 상에 제 2 절연 필름(320)이 형성된다.9, a plating layer 500 is formed, and a second insulating film 320 is formed on the first insulating film 310.
상기 도금층(500)은 전기 도금에 의해서 형성될 수 있다. 예를 들어, 상기 접속 부재(400)에 음극이 연결되어, 전해질에 포함된 구리 이온 등과 같은 금속 이온이 상기 접속 부재(400), 노출된 윈도우들(250) 및 노출된 후면전극들(210)에 도금된다.The plating layer 500 may be formed by electroplating. For example, a cathode is connected to the connection member 400 so that metal ions such as copper ions included in an electrolyte are transferred to the connection member 400, the exposed windows 250, and the exposed rear electrodes 210. Plated on.
상기 접속 부재(400)는 상기 후면전극들(210) 및 상기 윈도우들(250)에 완전히 밀착되지 않을 수 있다. 즉, 상기 접속 부재(400)의 일부는 상기 후면전극들(210) 및 상기 윈도우들(250)에 직접 접촉되지만, 상기 접속 부재(400)의 다른 일부는 상기 후면전극들(210) 및 상기 윈도우들(250)과 약간의 공간을 형성하며 이격될 수 있다.The connection member 400 may not be completely in contact with the back electrodes 210 and the windows 250. That is, a part of the connection member 400 is in direct contact with the back electrodes 210 and the windows 250, but the other part of the connection member 400 is the back electrodes 210 and the window. It may be spaced apart forming a space with the (250).
이때, 상기 접속 부재들(400), 상기 후면전극들(210)의 상면 및 상기 윈도우들(250)의 상면에 전기 도금에 의해서 도금층(500)이 형성된다. 또한, 상기 접속 부재들(400) 및 상기 후면전극들(210) 사이의 약간의 공간 및 상기 접속 부재들(400) 및 상기 윈도우들(250) 사이의 약간의 공간에 상기 도금층(500)이 형성될 수 있다.In this case, the plating layer 500 is formed by electroplating on the connection members 400, the top surfaces of the back electrodes 210, and the top surfaces of the windows 250. In addition, the plating layer 500 is formed in some space between the connection members 400 and the back electrodes 210 and in some space between the connection members 400 and the windows 250. Can be.
즉, 전해질에 포함된 금속 이온은 상기 접속 부재(400) 및 상기 윈도우들(250) 사이의 공간 및 상기 접속 부재(400) 및 상기 후면전극들(210) 사이의 공간에서도 도금될 수 있다That is, the metal ions included in the electrolyte may be plated in the space between the connection member 400 and the windows 250 and in the space between the connection member 400 and the back electrodes 210.
따라서, 상기 도금층(500)은 상기 접속 부재들(400) 및 상기 윈도우들(250) 사이 및 상기 접속 부재들(400) 및 상기 후면전극들(210) 사이의 전기적인 및 기계적인 특성을 향상시킨다.Accordingly, the plating layer 500 improves electrical and mechanical properties between the connection members 400 and the windows 250 and between the connection members 400 and the back electrodes 210. .
이와 같이, 실시예에 따른 태양전지 패널은 상기 접속 부재들(400)을 프린팅 방식에 의해서 일괄적으로 형성할 수 있다. 또한, 상기 도금층(500)에 의해서, 실시예에 따른 태양전지 패널은 향상된 특성을 가진다.As such, the solar cell panel according to the embodiment may collectively form the connection members 400 by a printing method. In addition, by the plating layer 500, the solar cell panel according to the embodiment has improved characteristics.
또한, 이상에서 실시예들에 설명된 특징, 구조, 효과 등은 본 발명의 적어도 하나의 실시예에 포함되며, 반드시 하나의 실시예에만 한정되는 것은 아니다. 나아가, 각 실시예에서 예시된 특징, 구조, 효과 등은 실시예들이 속하는 분야의 통상의 지식을 가지는 자에 의해 다른 실시예들에 대해서도 조합 또는 변형되어 실시 가능하다. 따라서 이러한 조합과 변형에 관계된 내용들은 본 발명의 범위에 포함되는 것으로 해석되어야 할 것이다.In addition, the features, structures, effects, and the like described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified with respect to other embodiments by those skilled in the art to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.
이상에서 실시예를 중심으로 설명하였으나 이는 단지 예시일 뿐 본 발명을 한정하는 것이 아니며, 본 발명이 속하는 분야의 통상의 지식을 가진 자라면 본 실시예의 본질적인 특성을 벗어나지 않는 범위에서 이상에 예시되지 않은 여러 가지의 변형과 응용이 가능함을 알 수 있을 것이다. 예를 들어, 실시예에 구체적으로 나타난 각 구성 요소는 변형하여 실시할 수 있는 것이다. 그리고 이러한 변형과 응용에 관계된 차이점들은 첨부된 청구 범위에서 규정하는 본 발명의 범위에 포함되는 것으로 해석되어야 할 것이다.Although described above with reference to the embodiment is only an example and is not intended to limit the invention, those of ordinary skill in the art to which the present invention does not exemplify the above within the scope not departing from the essential characteristics of this embodiment It will be appreciated that many variations and applications are possible. For example, each component specifically shown in the embodiment can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.
실시예에 따른 태양광 발전장치 및 이의 제조방법은 태양광 발전 분야에 이용될 수 있다.Photovoltaic device and its manufacturing method according to the embodiment can be used in the field of photovoltaic power generation.

Claims (17)

  1. 기판;Board;
    상기 기판 상에 배치되는 제 1 셀;A first cell disposed on the substrate;
    상기 제 1 셀에 인접하는 제 2 셀;A second cell adjacent to the first cell;
    상기 제 1 셀 및 상기 제 2 셀을 덮는 제 1 절연 필름; 및A first insulating film covering the first cell and the second cell; And
    상기 제 1 셀 및 상기 제 2 셀을 연결하는 접속 부재를 포함하며,A connecting member connecting the first cell and the second cell,
    상기 제 1 절연 필름은 상기 제 1 셀을 노출하는 제 1 비아 홀; 및 상기 제 2 셀을 노출하는 제 2 비아홀을 포함하고,The first insulating film may include a first via hole exposing the first cell; And a second via hole exposing the second cell;
    상기 접속 부재는 상기 제 1 비아 홀 및 상기 제 2 비아 홀을 통하여, 상기 제 1 셀 및 상기 제 2 셀을 연결하는 태양광 발전장치.And the connection member connects the first cell and the second cell through the first via hole and the second via hole.
  2. 제 1 항에 있어서, 상기 제 1 절연 필름 상에 배치되고, 상기 접속 부재를 덮는 제 2 절연 필름을 포함하는 태양광 발전장치.The solar cell apparatus according to claim 1, further comprising a second insulating film disposed on the first insulating film and covering the connection member.
  3. 제 1 항에 있어서, 상기 제 1 셀은The method of claim 1, wherein the first cell is
    상기 기판 상에 배치되는 제 1 후면전극;A first back electrode disposed on the substrate;
    상기 제 1 후면전극 상에 배치되는 제 1 광 흡수부; 및A first light absorbing part disposed on the first back electrode; And
    상기 제 1 광 흡수부 상에 배치되는 제 1 윈도우를 포함하고,A first window disposed on the first light absorbing portion,
    상기 제 2 셀은The second cell is
    상기 기판 상에 배치되는 제 2 후면전극;A second back electrode disposed on the substrate;
    상기 제 2 후면전극 상에 배치되는 제 2 광 흡수부; 및A second light absorbing part disposed on the second back electrode; And
    상기 제 2 광 흡수부 상에 배치되는 제 2 윈도우를 포함하고,A second window disposed on the second light absorbing portion,
    상기 접속 부재는 상기 제 1 윈도우 및 상기 제 2 후면전극을 연결하는 태양광 발전장치.The connection member is a photovoltaic device for connecting the first window and the second back electrode.
  4. 제 3 항에 있어서, 상기 접속 부재는 상기 제 1 윈도우의 상면에 직접 접촉하고 상기 제 2 후면전극의 상면에 직접 접촉하는 태양광 발전장치.The photovoltaic device of claim 3, wherein the connection member directly contacts an upper surface of the first window and directly contacts an upper surface of the second back electrode.
  5. 제 4 항에 있어서, 상기 제 2 광 흡수부는 상기 제 2 후면전극층의 상면이 노출되도록 계단 형상으로 적층되는 태양광 발전장치.The photovoltaic device of claim 4, wherein the second light absorbing unit is stacked in a step shape such that an upper surface of the second back electrode layer is exposed.
  6. 제 1 항에 있어서, 상기 접속 부재 및 상기 제 1 셀 사이 및 상기 접속 부재 및 상기 제 2 셀 사이에 형성되는 도금층을 포함하는 태양광 발전장치.The solar cell apparatus according to claim 1, further comprising a plating layer formed between the connection member and the first cell and between the connection member and the second cell.
  7. 제 1 항에 있어서, 상기 기판 및 상기 접속 부재는 플렉서블한 태양광 발전장치.The solar cell apparatus of claim 1, wherein the substrate and the connection member are flexible.
  8. 기판;Board;
    상기 기판 상에 배치되는 제 1 셀;A first cell disposed on the substrate;
    상기 제 1 셀에 인접하는 제 2 셀;A second cell adjacent to the first cell;
    상기 제 1 셀 및 상기 제 2 셀에 연결되는 접속 부재; 및A connection member connected to the first cell and the second cell; And
    상기 접속 부재의 외부면에 코팅되는 도금층을 포함하는 태양광 발전장치.A photovoltaic device comprising a plating layer coated on an outer surface of the connection member.
  9. 제 8 항에 있어서, 상기 도금층은 상기 제 1 셀 및 상기 접속 부재 사이에 개재되는 태양광 발전장치.The solar cell apparatus of claim 8, wherein the plating layer is interposed between the first cell and the connection member.
  10. 제 9 항에 있어서, 상기 도금층은 상기 제 2 셀 및 상기 접속 부재 사이에 개재되는 태양광 발전장치.The solar cell apparatus of claim 9, wherein the plating layer is interposed between the second cell and the connection member.
  11. 제 9 항에 있어서, 상기 제 1 셀 및 상기 제 2 셀을 덮는 제 1 절연 필름을 포함하고,The method of claim 9, further comprising a first insulating film covering the first cell and the second cell,
    상기 제 1 절연 필름은 상기 제 1 셀을 노출하는 제 1 비아 홀; 및 상기 제 2 셀을 노출하는 제 2 비아홀을 포함하고,The first insulating film may include a first via hole exposing the first cell; And a second via hole exposing the second cell;
    상기 접속 부재는 상기 제 1 비아 홀 및 상기 제 2 비아 홀을 통하여, 상기 제 1 셀 및 상기 제 2 셀을 연결하는 태양광 발전장치.And the connection member connects the first cell and the second cell through the first via hole and the second via hole.
  12. 제 11 항에 있어서, 상기 접속 부재는 상기 제 1 비아홀 내, 상기 제 2 비아홀 내 및 상기 제 1 절연 필름 상에 걸쳐서 배치되는 태양광 발전장치.The photovoltaic device of claim 11, wherein the connection member is disposed in the first via hole, in the second via hole, and on the first insulating film.
  13. 제 12 항에 있어서, 상기 접속 부재 및 상기 제 1 절연 필름을 덮는 제 2 절연 필름을 포함하는 태양광 발전장치.The solar cell apparatus according to claim 12, further comprising a second insulating film covering the connection member and the first insulating film.
  14. 기판 상에 서로 인접하는 제 1 셀 및 제 2 셀을 형성하는 단계;Forming a first cell and a second cell adjacent to each other on a substrate;
    상기 제 1 셀 및 상기 제 2 셀을 각각 노출하는 제 1 비아 홀 및 제 2 비아 홀이 형성되는 제 1 절연 필름을 형성하는 단계; 및Forming a first insulating film having a first via hole and a second via hole exposing the first cell and the second cell, respectively; And
    상기 제 1 비아 홀 및 상기 제 2 비아 홀을 통하여 상기 제 1 셀 및 상기 제 2 셀에 접속되는 접속 부재를 형성하는 단계를 포함하는 태양광 발전장치의 제조방법.And forming a connection member connected to the first cell and the second cell through the first via hole and the second via hole.
  15. 제 8 항에 있어서, 상기 접속 부재의 외부면에, 전기 도금에 의해서, 도금층을 형성하는 단계를 포함하는 태양광 발전장치의 제조방법.The method of manufacturing a photovoltaic device according to claim 8, comprising forming a plating layer on the outer surface of the connection member by electroplating.
  16. 제 15 항에 있어서, 상기 도금층은 상기 접속 부재 및 상기 제 1 셀 사이에 형성되는 태양광 발전장치의 제조방법.The method of claim 15, wherein the plating layer is formed between the connection member and the first cell.
  17. 제 16 항에 있어서, 상기 도금층은 상기 접속 부재 및 상기 제 2 셀 사이에 형성되는 태양광 발전장치의 제조방법.The method of claim 16, wherein the plating layer is formed between the connection member and the second cell.
PCT/KR2011/003124 2010-07-30 2011-04-27 Device for generating photovoltaic power and method for manufacturing same WO2012015150A1 (en)

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